He's written about the why. It's a tradeoff to make it easier for people to swit...

		maxerickson on April 17, 2018 \| parent \| context \| favorite \| on: Russia Bans 1.8M Amazon and Google IPs in Attempt ... He's written about the why. It's a tradeoff to make it easier for people to switch. https://signal.org/blog/contact-discovery/ (not just individual people obsessed with privacy, the large numbers of people who can see the advantage of privacy but may not invest a lot of effort to achieve it)

XMPP could utilize your existing email address as XMPP address - that's a solution as well.